Error - your app bundle is expected to be signed with the certificate with fingerprint I opted for Google signing key

I built .aab file using Android studio. I opted for Releases signed by Google Play. I assumed Google will generate and protect an app signing key for your releases. I am getting this error -

Your Android App Bundle is signed with the wrong key. Ensure that your App Bundle is signed with the correct signing key and try again. Your App Bundle is expected to be signed with the certificate with fingerprint:

SHA1: F4:AE:7F:26:EC:26:93:A2:4C:EC:B1:70:F5:B6:43:D6:64:93:B3:2D

but the certificate used to sign the App Bundle you uploaded has fingerprint:

SHA1: 20:6B:40:81:E7:61:A6:0E:5F:F7:A5:A7:43:D4:B5:22:B2:8E:9D:C7

Kindly help me t solve this error…